Java ExtendedFilter类代码示例

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public ExtendedFilter makeExtendedFilter(AbstractBounds<RowPosition> range,
                                         IDiskAtomFilter columnFilter,
                                         List<IndexExpression> rowFilter,
                                         int maxResults,
                                         boolean countCQL3Rows,
                                         boolean isPaging,
                                         long timestamp)
{
    DataRange dataRange;
    if (isPaging)
    {
        assert columnFilter instanceof SliceQueryFilter;
        SliceQueryFilter sfilter = (SliceQueryFilter)columnFilter;
        assert sfilter.slices.length == 1;
        // create a new SliceQueryFilter that selects all cells, but pass the original slice start and finish
        // through to DataRange.Paging to be used on the first and last partitions
        SliceQueryFilter newFilter = new SliceQueryFilter(ColumnSlice.ALL_COLUMNS_ARRAY, sfilter.isReversed(), sfilter.count);
        dataRange = new DataRange.Paging(range, newFilter, sfilter.start(), sfilter.finish(), metadata.comparator);
    }
    else
    {
        dataRange = new DataRange(range, columnFilter);
    }
    return ExtendedFilter.create(this, dataRange, rowFilter, maxResults, countCQL3Rows, timestamp);
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
private Composite makePrefix(CompositesIndex index, ByteBuffer key, ExtendedFilter filter, boolean isStart)
{
    if (key.remaining() == 0)
        return Composites.EMPTY;

    Composite prefix;
    IDiskAtomFilter columnFilter = filter.columnFilter(key);
    if (columnFilter instanceof SliceQueryFilter)
    {
        SliceQueryFilter sqf = (SliceQueryFilter)columnFilter;
        Composite columnName = isStart ? sqf.start() : sqf.finish();
        prefix = columnName.isEmpty() ? index.getIndexComparator().make(key) : index.makeIndexColumnPrefix(key, columnName);
    }
    else
    {
        prefix = index.getIndexComparator().make(key);
    }
    return isStart ? prefix.start() : prefix.end();
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
/**
 * Performs a search across a number of column indexes
 *
 * @param filter the column range to restrict to
 * @return found indexed rows
 */
public List<Row> search(ExtendedFilter filter)
{
    List<SecondaryIndexSearcher> indexSearchers = getIndexSearchersForQuery(filter.getClause());

    if (indexSearchers.isEmpty())
        return Collections.emptyList();

    SecondaryIndexSearcher mostSelective = null;
    long bestEstimate = Long.MAX_VALUE;
    for (SecondaryIndexSearcher searcher : indexSearchers)
    {
        SecondaryIndex highestSelectivityIndex = searcher.highestSelectivityIndex(filter.getClause());
        long estimate = highestSelectivityIndex.estimateResultRows();
        if (estimate <= bestEstimate)
        {
            bestEstimate = estimate;
            mostSelective = searcher;
        }
    }

    return mostSelective.search(filter);
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
@Override
protected SecondaryIndexSearcher createSecondaryIndexSearcher(Set<ByteBuffer> columns)
{
    return new SecondaryIndexSearcher(baseCfs.indexManager, columns)
    {
        
        @Override
        public List<Row> search(ExtendedFilter filter)
        {
            return Arrays.asList(new Row(LAST_INDEXED_KEY, LAST_INDEXED_ROW));
        }

        @Override
        public void validate(IndexExpression indexExpression) throws InvalidRequestException
        {
            if (indexExpression.value.equals(ByteBufferUtil.bytes("invalid")))
                throw new InvalidRequestException("Invalid search!");
        }
        
    };
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
private Row getRow(DecoratedKey key, ExtendedFilter filter)
{
    try
    {
        ColumnFamilyStore store = backend.getBaseCfs();
        ReadCommand cmd = ReadCommand.create(store.metadata.ksName,
                                             key.key,
                                             store.metadata.cfName,
                                             System.currentTimeMillis(),
                                             filter.columnFilter(key.key));

        return cmd.getRow(store.keyspace);
    }
    finally
    {
        controller.checkpoint();
    }
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
private static List<Row> getIndexed(ColumnFamilyStore store, IDiskAtomFilter columnFilter, DecoratedKey startKey, int maxResults, IndexExpression... expressions)
{
    IPartitioner p = StorageService.getPartitioner();
    AbstractBounds<RowPosition> bounds;

    if (startKey == null)
    {
        bounds = new Range<>(p.getMinimumToken(), p.getMinimumToken()).toRowBounds();
    }
    else
    {
        bounds = new Bounds<>(startKey, p.getMinimumToken().maxKeyBound(p));
    }

    return store.indexManager.search(ExtendedFilter.create(store,
                                     new DataRange(bounds, columnFilter),
                                     Arrays.asList(expressions),
                                     maxResults,
                                     false,
                                     System.currentTimeMillis()));
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public ExtendedFilter makeExtendedFilter(AbstractBounds<RowPosition> range,
                                         IDiskAtomFilter columnFilter,
                                         List<IndexExpression> rowFilter,
                                         int maxResults,
                                         boolean countCQL3Rows,
                                         boolean isPaging,
                                         long timestamp)
{
    DataRange dataRange;
    if (isPaging)
    {
        assert columnFilter instanceof SliceQueryFilter;
        SliceQueryFilter sfilter = (SliceQueryFilter)columnFilter;
        assert sfilter.slices.length == 1;
        SliceQueryFilter newFilter = new SliceQueryFilter(ColumnSlice.ALL_COLUMNS_ARRAY, sfilter.isReversed(), sfilter.count);
        dataRange = new DataRange.Paging(range, newFilter, sfilter.start(), sfilter.finish(), metadata.comparator);
    }
    else
    {
        dataRange = new DataRange(range, columnFilter);
    }
    return ExtendedFilter.create(this, dataRange, rowFilter, maxResults, countCQL3Rows, timestamp);
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
private Composite makePrefix(CompositesIndex index, ByteBuffer key, ExtendedFilter filter, boolean isStart)
{
    if (key.remaining() == 0)
        return Composites.EMPTY;

    Composite prefix;
    IDiskAtomFilter columnFilter = filter.columnFilter(key);
    if (columnFilter instanceof SliceQueryFilter)
    {
        SliceQueryFilter sqf = (SliceQueryFilter)columnFilter;
        prefix = index.makeIndexColumnPrefix(key, isStart ? sqf.start() : sqf.finish());
    }
    else
    {
        prefix = index.getIndexComparator().make(key);
    }
    return isStart ? prefix.start() : prefix.end();
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public List<Row> executeLocally()
{
    ColumnFamilyStore cfs = Keyspace.open(keyspace).getColumnFamilyStore(columnFamily);

    ExtendedFilter exFilter = cfs.makeExtendedFilter(keyRange, predicate, rowFilter, maxResults, countCQL3Rows, isPaging, timestamp);
    if (cfs.indexManager.hasIndexFor(rowFilter))
        return cfs.search(exFilter);
    else
        return cfs.getRangeSlice(exFilter);
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public List<Row> getRangeSlice(ExtendedFilter filter)
{
    long start = System.nanoTime();
    try (OpOrder.Group op = readOrdering.start())
    {
        return filter(getSequentialIterator(filter.dataRange, filter.timestamp), filter);
    }
    finally
    {
        metric.rangeLatency.addNano(System.nanoTime() - start);
    }
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
@Override
public List<Row> search(ExtendedFilter filter)
{
    assert filter.getClause() != null && !filter.getClause().isEmpty();
    final IndexExpression primary = highestSelectivityPredicate(filter.getClause());
    final CompositesIndex index = (CompositesIndex)indexManager.getIndexForColumn(primary.column);
    // TODO: this should perhaps not open and maintain a writeOp for the full duration, but instead only *try* to delete stale entries, without blocking if there's no room
    // as it stands, we open a writeOp and keep it open for the duration to ensure that should this CF get flushed to make room we don't block the reclamation of any room being made
    try (OpOrder.Group writeOp = baseCfs.keyspace.writeOrder.start(); OpOrder.Group baseOp = baseCfs.readOrdering.start(); OpOrder.Group indexOp = index.getIndexCfs().readOrdering.start())
    {
        return baseCfs.filter(getIndexedIterator(writeOp, filter, primary, index), filter);
    }
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
@Override
public List<Row> search(ExtendedFilter filter)
{
    assert filter.getClause() != null && !filter.getClause().isEmpty();
    final IndexExpression primary = highestSelectivityPredicate(filter.getClause());
    final SecondaryIndex index = indexManager.getIndexForColumn(primary.column);
    // TODO: this should perhaps not open and maintain a writeOp for the full duration, but instead only *try* to delete stale entries, without blocking if there's no room
    // as it stands, we open a writeOp and keep it open for the duration to ensure that should this CF get flushed to make room we don't block the reclamation of any room  being made
    try (OpOrder.Group writeOp = baseCfs.keyspace.writeOrder.start(); OpOrder.Group baseOp = baseCfs.readOrdering.start(); OpOrder.Group indexOp = index.getIndexCfs().readOrdering.start())
    {
        return baseCfs.filter(getIndexedIterator(writeOp, filter, primary, index), filter);
    }
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
/**
 * Performs a search across a number of column indexes
 * TODO: add support for querying across index types
 *
 * @param filter the column range to restrict to
 * @return found indexed rows
 */
public List<Row> search(ExtendedFilter filter)
{
    List<SecondaryIndexSearcher> indexSearchers = getIndexSearchersForQuery(filter.getClause());

    if (indexSearchers.isEmpty())
        return Collections.emptyList();

    //We currently don't support searching across multiple index types
    if (indexSearchers.size() > 1)
        throw new RuntimeException("Unable to search across multiple secondary index types");

    return indexSearchers.get(0).search(filter);
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public List<Row> search(ExtendedFilter filter)
{
    metrics.markRequest();

    long startTime = System.nanoTime();

    try
    {
        return filter != null && !filter.getClause().isEmpty()
                ? new QueryPlan(SSTableAttachedSecondaryIndex.this, filter, DatabaseDescriptor.getRangeRpcTimeout()).execute()
                : Collections.<Row>emptyList();
    }
    catch (Exception e)
    {
        metrics.markFailure();

        if (e instanceof TimeQuotaExceededException)
            metrics.markTimeout();
        else
            logger.warn("error occurred while searching SASI indexes; ignoring", e);

        return Collections.emptyList();
    }
    finally
    {
        metrics.updateLatency(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
    }
}
 

import org.apache.cassandra.db.filter.ExtendedFilter; //导入依赖的package包/类
public QueryController(SSTableAttachedSecondaryIndex backend, ExtendedFilter filter, long timeQuotaMs)
{
    this.backend = backend;
    this.executionQuota = TimeUnit.MILLISECONDS.toNanos(timeQuotaMs);
    this.executionStart = System.nanoTime();
    this.scope = getSSTableScope(backend.getBaseCfs(), filter);
}